Out of place?

Talk of Roger Whittaker elsewhere on this site brought an old memory to the surface.

For some reason, Ralph McTell (who is not at all like Roger Whittaker, but inexplicably linked with him in the murk of my subconscious) performed a concert at my primary school in 1974. Why would this be? It pre-dated the trend for concerts in schools. Did he have a schools-based tour going on? (Unlikely, I would have thought, given that he was at the height of his Streets of London fame.) He doesn't appear to have had a connection with the school, or the area (pre-yuppification Balham).

Anyway, my recollection is that I was less than impressed with Streets of London, but I do now remember that a song called Zig Zag Line stuck in my mind. I can't find a sample of it online now, but Wikipedia has a page about the album it came from: Easy, which also featured (amongst others) Bert Jansch, two former members of Fairport Convention and Danny (not related to Richard) Thompson.

Given that there is a certain fascination with the 70s, is it time for Ralph McTell to have a resurgence? I'm certainly tempted.